Sterling Metals Corp. (TSXV: SAG, OTCQB: SAGGF) (“Sterling” or the “Company”) is pleased to announce the discovery of a high-grade copper zone at its Soo Copper Project (“Soo Copper” or the “Project”) located in Batchewana Bay, Ontario. Drill hole MEPS-25-02, part of the Company’s Phase 2 exploration program, discovered a high-grade copper and gold zone within a continuous, bulk-tonnage copper-molybdenum-silver-gold porphyry system (Figure 5).
Highlights
- Discovery hole intersects 262.5m of 1.05% CuEq starting from 47.5m downhole, including a new high-grade bornite zone with 68.3m grading 3.25% CuEq starting at 179.7m downhole, featuring semi-massive bornite and chalcopyrite grading up to 9.3m of 19.98% CuEq (see Table 1 for full results and Figure 6).
- Highest copper and gold grades encountered to date at Soo Copper, including:
- 33% Cu over 0.55m starting at 220.45m depth; and
- 196 g/t Au and 21.3% Cu over 0.6m starting at 219.85m depth.
- Newly discovered high-grade Cu-Au mineralization, characterized by bornite and associated porphyry dykes, indicates a robust, large-scale Cu-Au-Ag-Mo system with the potential to transform the Project.
- Phase 2 drilling has been expanded from a minimum of 3,000m to at least 6,000m.
- A core photo gallery is now available on Sterling’s website
- The Company will be hosting a live webinar to discuss the results on Wednesday, October 1, 2025, at 11:00 am eastern.
Significance of the MEPS Target
The MEPS target was selected for its surface mineralization at the Cave Showing where Sterling Metals sampled veins with up to 15.9% Cu in 2024 , its coincidence with a large resistivity low, and its proximity to the GFP Porphyry discovered in Phase 1 (hole MJ-25-01). The first hole drilled at MEPS provided critical geological context, refining the interpretation of the mineralized trend and guiding adjustments to subsequent drill angles.
Building on this foundation, MEPS-25-02 was designed to test a more favourable portion of the target. The hole revealed bornite within the first 25m and intersected continuous visible mineralization to over 350m downhole. Assays confirmed a 68.3m high-grade copper zone within a broader mineralized interval, including the highest copper and gold grades ever recorded at Soo Copper. Importantly, the reported interval contained no pyrite or pyrrhotite, reinforcing the high tenor of the system.
Sterling’s leadership emphasized both the technical precision that guided the targeting of MEPS-25-02 and the bold decision-making that led to its success.
Jeremy Niemi, Senior Vice President Exploration and Evaluation, commented:
“By integrating surface geology, resistivity data, and insights from our Phase 1 drilling, we refined our targeting model and were able to adjust in real time. MEPS-25-02 immediately delivered bornite from near surface and went on to produce the highest copper and gold grades drilled to date. This validates our geological approach and confirms the GFP Porphyry as a key driver of mineralization at Soo Copper.”
Dr. Neil O’Brien, Technical Advisor, added:
“This discovery clearly indicates the potential for a giant magmatic hydrothermal (‘porphyry’) Cu-Au-Mo deposit within the Batchewana peninsula. The high Cu-Au grades due to bornite, coupled with strongly developed potassic alteration and extensive porphyry dykes, all point to a robust and focused mineralizing event that we have just begun to tap.”
Mathew Wilson, CEO and Director, concluded:
“The decision to drill MEPS-25-02 was not part of the original plan, but the team recognized the opportunity and had the conviction to act on it. That ability to combine rigorous science with decisive execution is exactly what positions Sterling to continue unlocking discoveries of this caliber.”
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